Or you can always just add it into the official linksys firmware. 
Here is my notes on it.  Sort of cryptic because I was just using it
as a reference for myself:

# extract kernel
dd if=WRT54GV2_3.01.3_US_code.bin of=kern.gz count=669953 bs=1 skip=60

bs is bs from below subtract 59 for the header 670012 - 59 = 669953

# extract cramfs 
dd if=WRT54GV2_3.01.3_US_code.bin of=cramfs.img bs=670012 skip=1

# bs value is obtained by looking for "45 3d cd"
doing a hexdump -C file.bin you should see the start of the cramfs:

[EMAIL PROTECTED] 3.01.3 # hexdump -C WRT54GV2_3.01.3_US_code.bin |grep "45 3d 
cd"
|more 
000a3930  7f fe 03 d3 4f 2b c6 00  e0 17 00 00 45 3d cd 28  |....O+......E=.(|

[EMAIL PROTECTED] 3.01.3 # hexdump -C WRT54GV2_3.01.3_US_code.bin |grep 000a39 
|more   
000a3930  7f fe 03 d3 4f 2b c6 00  e0 17 00 00 45 3d cd 28  |....O+......E=.(|
000a3940  00 f0 28 00 03 00 00 00  00 00 00 00 43 6f 6d 70  |..(.........Comp|
000a3950  72 65 73 73 65 64 20 52  4f 4d 46 53 e6 01 60 92  |ressed ROMFS..`.|
000a3960  00 00 00 00 8f 07 00 00  0e 01 00 00 43 6f 6d 70  |............Comp|
000a3970  72 65 73 73 65 64 00 00  00 00 00 00 ed 41 00 00  |ressed.......A..|

----------------------
To put the firmware back together:

more 3.01.3/mkfirm.sh 
/sbin/mkfs.cramfs custom/ ./cus-cramfs.bin 
../trx -o ./trx.bin kern.bin cus-cramfs.bin
../addpattern -i trx.bin -o done.bin

On Apr 9, 2005 11:52 AM, Paul Hilton <[EMAIL PROTECTED]> wrote:
> Thanks for the info.
> 
> Unfortunately the non Experimental OpenWRT doesn't claim to support the
> v3 hardware that is currently being sold. (Which is what I have)
> 
> I'll try to get a version fuse to compile & try it again.
> 
> Paul
> 
> On Sat, 2005-04-09 at 14:23, A C wrote:
> > You have to recomplie fuse for your build of OpenWRT.  You're using
> > the experimental build which uses the 2.4.29 kernel sources.  eWRT
> > uses the stock kernel 2.4.20.
> >
> > Christian's binaries work fine with the non Experimental version of
> > OpenWRT because they are the same kernel versions.
> >
> 
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